Engine Sub-Model

{
  "id": "MLC-T-ENV-009622",
  "term": "Engine Sub-Model",
  "field": "Environment",
  "definition": "Designation for a grouping of engines with essentially identical design, especially with respect to the core engine and combustor designs and other emission-related features. Engines from an engine sub-model must be contained within a single engine model. For purposes of this part, an original engine model configuration is considered a sub-model. For example, if a manufacturer initially produces an engine model designated ABC and later introduces a new sub-model ABC-1, the engine model consists of two sub-models: ABC and ABC-1.",
  "references": [
    "40 CFR 87.1 (CFR 2018)"
  ],
  "url": "https://mlchart.com/terminology/environment/engine-sub-model/"
}